Step 1
Add the ground beef, onion, and garlic to a skillet. Brown for 5-7 minutes, breaking up the meat as it cooks. You can also do this directly in the slow cooker if you have a saute feature. Season with salt and pepper.
Step 2
Add this to the slow cooker along with the crushed tomatoes, marinara sauce, chicken broth, and Italian seasoning. Cook on low for 4 hours (you can cook it up to 8 hours as well).